Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a26ac70127ca82…

MALICIOUS

PDF

42.2 KB Created: 2020-08-10 08:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15481a735a7e630341e05b980a0c73bc SHA-1: 72e82397a8cbdd2548c308fc781ee2e898e6a0a1 SHA-256: 96a26ac70127ca8281c6d79ac2c744a459208abbaaa0d7081126f204cf348f50
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external files hosted on Shopify and other domains. One critical heuristic firing indicates a PDF redirector link to 'ttraff.cc', which is known malicious infrastructure. The document body text, though garbled, contains the same lure text and URLs, suggesting a link farm or SEO poisoning tactic to distribute malicious PDFs. No scripts were extracted, but the primary attack vector appears to be social engineering via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=paulo+coelho+hippie+pdf+gratuit
    • http://purev.chriscooperart.co/uploads/1/3/2/6/132682883/c5955101a17cf2.pdf
    • http://files.woodlawncountryclubfc.com/uploads/1/3/1/6/131636972/lariragovof.pdf
    • http://dusuxa.nordcapetravel.net/uploads/1/3/1/6/131637814/pupewazalumim.pdf
    • http://kudasov.libbyfarrelly.com/uploads/1/3/0/7/130739553/7b2ed72.pdf
    • https://cdn.shopify.com/s/files/1/0431/2694/7989/files/fosegulix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/42639937850.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98908457197.pdf
    • https://cdn.shopify.com/s/files/1/0430/6114/9850/files/67102443954.pdf
    • https://cdn.shopify.com/s/files/1/0428/7237/3414/files/98948943593.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/77259776387.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/zasar.pdf
    • https://cdn.shopify.com/s/files/1/0447/8078/1734/files/30298368381.pdf
    • https://cdn.shopify.com/s/files/1/0433/1703/5166/files/395206298.pdf
    • https://cdn.shopify.com/s/files/1/0429/6900/6236/files/57574006917.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006871.bin
3ec5371a6c99b29ffe7e007928b4ac38f082164ac75ce7fd490e8922f793e16a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6871 5240 bytes
font_01_sfnt_off00007a42.bin
dee86ef4c85fa370bff57ec486a47e4f515ea33ecb0b23f1ed1bf424f3876cd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A42 9860 bytes